Method for determining a time to impact in a danger zone for a vehicle having a pre-crash sensing system
First Claim
1. A pre-crash sensing system for a source vehicle having a source vehicle length and a source vehicle width coupled to a countermeasure system comprising:
- an object sensor generating an object distance signal and object speed signal and an object classification signal; and
a controller coupled to said object sensor, said controller determining a danger zone in response to the source vehicle length, source vehicle width, object length and object width, determining a source vehicle time interval corresponding to the time the source vehicle is within said danger zone, determining a object time interval corresponding to the time the object is within said danger zone and, when the source vehicle time interval coincides with the target vehicle time interval, said controller activating the countermeasure system.
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Accused Products
Abstract
A pre-crash sensing system (10) for a source vehicle (50) having a source vehicle length and a source vehicle width that is coupled to a countermeasure system (30) is described. The system includes an object sensor (17) generating object distance signal, object relative velocity signal and an object classification signal. A controller (12) is coupled to the object sensor (17). The controller determines a danger zone (52) based on the source vehicle length, source vehicle width, object length and object width. The controller determines a source vehicle time interval corresponding to the time the source vehicle is within the danger zone. Controller (12) determines an object time interval corresponding to the time the object is within the danger zone and when the source vehicle time interval corresponds with the target vehicle time interval. The controller activates the countermeasure system (30) when the source vehicle time interval coincides with the target vehicle time interval.
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Citations
22 Claims
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1. A pre-crash sensing system for a source vehicle having a source vehicle length and a source vehicle width coupled to a countermeasure system comprising:
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an object sensor generating an object distance signal and object speed signal and an object classification signal; and
a controller coupled to said object sensor, said controller determining a danger zone in response to the source vehicle length, source vehicle width, object length and object width, determining a source vehicle time interval corresponding to the time the source vehicle is within said danger zone, determining a object time interval corresponding to the time the object is within said danger zone and, when the source vehicle time interval coincides with the target vehicle time interval, said controller activating the countermeasure system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for operating a pre-crash sensing system for a source vehicle having a source vehicle width and length having a countermeasure system, said method comprising:
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measuring a source vehicle speed;
determining an object distance, object relative velocity and object travel direction;
determining an object classification with a vision system;
determining an object length and object width corresponding to the object classification;
determining a danger zone based on the source vehicle length, source vehicle width, object length, object width and object travel direction;
determining a source vehicle time interval corresponding to the time the source vehicle is within said danger zone;
determining an object time interval corresponding to the time the object is within said danger zone; and
when the source vehicle time interval coincides with the object time interval, activating the countermeasure system. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method for operating a pre-crash sensing system for a source vehicle having a source vehicle width and length having a countermeasure system, said method comprising:
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measuring a source vehicle speed;
measuring a source vehicle acceleration;
determining a target vehicle distance and target vehicle velocity;
determining a target vehicle acceleration;
determining a target vehicle classification with a vision system;
determining a target vehicle length and target vehicle width corresponding to the target vehicle classification;
determining an angle between a source vehicle direction and a target vehicle direction;
determining a danger zone based on the source vehicle length, source vehicle width and object length and object width;
determining a source vehicle time interval corresponding to the time the source vehicle is within said danger zone as a function of the angle, the source vehicle velocity and the source vehicle acceleration;
determining a target vehicle time interval corresponding to the time the target vehicle is within said danger zone as a function of the angle, the target vehicle velocity and target vehicle acceleration; and
when the source vehicle time interval coincides with the target vehicle time interval, activating the countermeasure system. - View Dependent Claims (22)
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Specification